<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>并集选择器</title>
    <style>
        div,
        p,
        span {
            color: red;
        }
    </style>
</head>

<body>
    <!-- 
        并集选择器
        标签相同的样式
    -->
    <div>11</div>
    <p>22</p>
    <span>33</span>
</body>

</html>